Abstract
An overview of the mechanical bonding of dissimilar bulk engineering metals through high-pressure torsion (HPT) processing at room temperature is described in this Review. A recently developed procedure of mechanical bonding involves the application of conventional HPT processing to alternately stacked two or more disks of dissimilar metals. A macroscale microstructural evolution involves the concept of making tribomaterials and, for some dissimilar metal combinations, microscale microstructural changes demonstrate the synthesis of metal matrix nanocomposites (MMNCs) through the nucleation of nanoscale intermetallic compounds within the nanostructured metal matrix. Further straining by HPT during mechanical bonding provides an opportunity to introduce limited amorphous phases and a bulk metastable state. The mechanically bonded nanostructured hybrid alloys exhibit an exceptionally high specific strength and an enhanced plasticity. These experimental findings suggest a potential for using mechanical bonding for simply and expeditiously fabricating a wide range of new alloy systems by HPT processing.
| Original language | English |
|---|---|
| Article number | 1901289 |
| Journal | Advanced Engineering Materials |
| Volume | 22 |
| Issue number | 4 |
| DOIs | |
| State | Published - Apr 1 2020 |
| Externally published | Yes |
Funding
This study was supported in part by the National Science Foundation of the United States under grant no. DMR‐1810343 (M.K.), in part by the National Research Foundation of Korea funded by the Ministry of Science and ICT under grant no. 2017R1A2B4012255 (J.I.J.), and in part by the European Research Council under ERC grant agreement no. 267464‐SPDMETALS (T.G.L.). This article is part of the Advanced Engineering Materials Hall of Fame article series, which highlights the work of top scientists in the field of engineering materials. This study was supported in part by the National Science Foundation of the United States under grant no. DMR-1810343 (M.K.), in part by the National Research Foundation of Korea funded by the Ministry of Science and ICT under grant no. 2017R1A2B4012255 (J.I.J.), and in part by the European Research Council under ERC grant agreement no. 267464-SPDMETALS (T.G.L.). This article is part of the Advanced Engineering Materials Hall of Fame article series, which highlights the work of top scientists in the field of engineering materials.
Keywords
- grain refinement
- hardness
- high-pressure torsion
- mechanical bonding
- mechanical properties